Zappos Hack Exposes Passwords

Zappos was hacked recently and has requested the users to change their passwords. But if you are a user accessing the site from out of the country, it shows you a splash screen that the site is under construction. How must a user change password if he or she cannot access the site. I heard the site is hosted by Amazon WS. Can this site be trusted and the provider that owns the business. What are your thoughts?